Preparation method of nano silver suspending liquid

A technology of suspension and nano-silver, which is applied in botany equipment and methods, animal repellants, biocides, etc., can solve the problems of long production cycle, wide distribution, and reduced particle growth rate, and achieve low production cost and high application Wide area and high sterilization efficiency

Inactive Publication Date: 2007-02-28
张宝荣 +1
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Problems solved by technology

The single-injection dripping method usually adopts the method of slow dripping to realize the low concentration of the reactants to participate in the reaction. Although this reduces the concentration of one of the reactants to a certain extent, it cannot make the two reactants at a low concentration at the same time. reaction, the growth rate of particles cannot be reduced to the greatest extent, and there is a lack of corresponding supporting devices to assist in solving the problem of reactant concentration, which even

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  • Preparation method of nano silver suspending liquid

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[0010] As shown in Figure 1, the reduction method and the complex method are used to prepare the nano-silver suspension. The raw materials used are ammonia, purified water, and silver nitrate (99.999%). The preparation method is: first mix and dilute silver nitrate with purified water Into the usable silver nitrate aqueous solution, and then press silver nitrate 0.15-4.8 (weight): 1-3.5 (volume) concentrated ammonia water (complexing agent) into the silver nitrate aqueous solution within a certain period of time to carry out the silver ammonia complex reaction And ion coordination, and then the mixed solution is heated in stages to remove ammonia to obtain an aqueous suspension of spherical nano-particles, in which the silver content ranges from 5 to 1000 ppm, and the silver particle size is from 0.1 to 20 nm.

[0011] The heating and ammonia removal process is carried out in stages, at least twice.

[0012] Sterilization experiments were performed on the nano-silver suspension pr...

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Abstract

The invention discloses a preparing method of nanometer silver suspension, which comprises the following steps: adding silver nitrate solution in the purified water to dilute, putting certain quantity of ammonial solution (coordination agent) in the silver nitrate solution within regulated time, proceeding silver ammino complex reaction and ion coordination, heating the mixing solution sequently to remove ammonium, obtaining ball-shaped nanometer silver ionic suspension (the silver content scale is 5-1000ppm, the silver particle size is 0.1-20nm ).

Description

technical field [0001] The invention relates to a nano-silver suspension preparation, which can be applied to ceramic materials, environmental protection materials, electronic materials, coating industry and the like, in particular to a nano-silver preparation with high-efficiency sterilization, antibacterial and anti-inflammatory effects. Background technique [0002] Silver has been used for thousands of years. By the 1930s, a variety of silver elements and compounds were used for antibacterial treatment. A large number of research results show that silver has many advantages such as non-toxic, non-allergic, non-drug resistance, and no cross-drug interference when used in antibacterial therapy. Organisms, which have respiratory enzymes to keep them alive, the silver meets the respiratory enzymes and binds to them, causing the bacteria to die. Compared with ordinary silver, the nano-silver suspension prepared by the present invention has a qualitative leap in high-efficien...

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Application Information

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IPC IPC(8): A01N59/16A01N25/04
Inventor 张宝荣毛龙飞
Owner 张宝荣
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